[PATCH] scripts: fix memleak error in read_file

[linfeilong <linfeilong@huawei.com>]

An error is found by the static code analysis tool: "memleak"
Fix this by add free before return.

Signed-off-by: Feilong Lin <linfeilong@huawei.com>
---
 scripts/insert-sys-cert.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/insert-sys-cert.c b/scripts/insert-sys-cert.c
index 8902836..22d99a8 100644
--- a/scripts/insert-sys-cert.c
+++ b/scripts/insert-sys-cert.c
@@ -250,6 +250,7 @@ static char *read_file(char *file_name, int *size)
 	}
 	if (read(fd, buf, *size) != *size) {
 		perror("File read failed");
+		free(buf);
 		close(fd);
 		return NULL;
 	}
-- 
1.8.3.1